Begin refactor.

src/ui/rectangle.h

@@ -6,12 +6,18 @@
  */
 
 #pragma once
-#include <dawn/dawn.h>
+#include "../libs.h"
 #include "../display/texture.h"
 #include "../display/shader.h"
 #include "../display/primitive.h"
 #include "../display/primitives/quad.h"
 
+typedef struct {
+  float width, height;
+  texture_t texture;
+  primitive_t quad;
+} rectangle_t;
+
 void rectangleInit(rectangle_t *rectangle);
 
 void rectangleSetColor(rectangle_t *rectangle, pixel_t color);